Under his direction the altars where Baal was worshiped were smashed, and the incense altars near them were torn down. They ground to dust the images of Asherah and all the other idols and then scattered the dust on the graves of the people who had sacrificed to them. 1
References for 2 Chronicles 34:4
34.4 2 K 21.3; 2 Ch 33.3.